feat: convert grpc errors to http status codes (#1997)

* feat: convert grpc errors to http status codes

* chore: circuit break include unimplemented grpc error

* chore: add reference link in comments

rest/internal/errcode/grpc.go

@@ -0,0 +1,55 @@
+package errcode
+
+import (
+	"net/http"
+
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+// CodeFromGrpcError converts the gRPC error to an HTTP status code.
+// See: https://github.com/googleapis/googleapis/blob/master/google/rpc/code.proto
+func CodeFromGrpcError(err error) int {
+	code := status.Code(err)
+	switch code {
+	case codes.OK:
+		return http.StatusOK
+	case codes.InvalidArgument, codes.FailedPrecondition, codes.OutOfRange:
+		return http.StatusBadRequest
+	case codes.Unauthenticated:
+		return http.StatusUnauthorized
+	case codes.PermissionDenied:
+		return http.StatusForbidden
+	case codes.NotFound:
+		return http.StatusNotFound
+	case codes.Canceled:
+		return http.StatusRequestTimeout
+	case codes.AlreadyExists, codes.Aborted:
+		return http.StatusConflict
+	case codes.ResourceExhausted:
+		return http.StatusTooManyRequests
+	case codes.Internal, codes.DataLoss, codes.Unknown:
+		return http.StatusInternalServerError
+	case codes.Unimplemented:
+		return http.StatusNotImplemented
+	case codes.Unavailable:
+		return http.StatusServiceUnavailable
+	case codes.DeadlineExceeded:
+		return http.StatusGatewayTimeout
+	}
+
+	return http.StatusInternalServerError
+}
+
+// IsGrpcError checks if the error is a gRPC error.
+func IsGrpcError(err error) bool {
+	if err == nil {
+		return false
+	}
+
+	_, ok := err.(interface {
+		GRPCStatus() *status.Status
+	})
+
+	return ok
+}